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The American Glass Supply Etched Dichroic Pendant Kit COE96 has:
Coefficient of Expansion of 96 means it will expand 0.0000096 inches for each 1 degree centigrade (1.8 degrees Fahrenheit), and is therefore compatible with other COE96 glass.Dichroic coating was developed by NASA in the early 1990s for use in satellite mirrors.
The dichroic coating makes the glass appear to have more than one color at the same time, especially when it is viewed from multiple angles.
Each kit has enough total pieces to make eight 2”-long dichroic glass pendants.